Mila Kunis and Ashton Kutcher went to a dog park together in Los Angeles. Credit: AKM-GSI

That's one way to dress a bump! With her due date quickly approaching, Mila Kunis stepped out on Saturday, Sept. 6, in a pair of hip denim overalls. 

Pregnant with her first child, Kunis, 31, covered her bump in the California sun in the zipper-embellished jean one-piece with the cuffs rolled up. Underneath, she wore a simple black tank top, and accessorized with slip-on shoes and mirrored aviator sunglasses. 

Her husband-to-be Ashton Kutcher continued the denim palette for the couple's day at a Los Angeles dog park. He wore an unbuttoned collared jean shirt over a white V-neck T-shirt with dark-colored shorts, Adidas sneakers, an Iowa baseball cap, and aviator sunglasses. 

The future parents got down and dirty at the dog run, having some fun with their two pups. Kunis and Kutcher, 36, have been keeping active with the dogs during Kunis' pregnancy, taking them on long walks near their California home. 

The time with the dogs may be one of the more adventurous activities for Kutcher as of late, as sources told Us Weekly that Kunis wants the dad-to-be to "stop being such a daredevil."

"With the baby coming, Mila wants Ashton to be a lot more careful," an insider added.